"Zwischen Partizipationsversprechen und Algorithmenmacht. Wie soziale Medien Meinungsbildung und Orientierung in der Welt prägen [Between Promise of Participation and Power of Algorithms. How Social Media Impacts Opinion Formation and Orientation in the World]", lecture by J.-H. Schmidt at the conference "Grüße aus dem Wahrheitsministerium [Greetings from the Ministry of Truth]", organised by the ServiceBureau Jugendinformation [Youth Information] on 31 May 2018 in Bremen.